From 11976fe2a47aa952b8fec54bc2bd54d57642f650 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Tue, 6 Jun 2023 18:54:10 -0700
Subject: xtensa: drop platform_restart

Instead of using xtensa-specific platform_restart callback use
do_kernel_restart in the machine_restart implementation and reimplement
existing platform_restart users with register_restart_handler.
Drop platform_restart declaration and default implementation.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
 arch/xtensa/kernel/platform.c | 1 -
 arch/xtensa/kernel/setup.c    | 8 +++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

(limited to 'arch/xtensa/kernel')

diff --git a/arch/xtensa/kernel/platform.c b/arch/xtensa/kernel/platform.c
index bb4d426ebb44..526ab744271f 100644
--- a/arch/xtensa/kernel/platform.c
+++ b/arch/xtensa/kernel/platform.c
@@ -28,7 +28,6 @@
 
 _F(void, init, (bp_tag_t *first), { });
 _F(void, setup, (char** cmd), { });
-_F(void, restart, (void), { while(1); });
 _F(void, halt, (void), { while(1); });
 _F(void, power_off, (void), { while(1); });
 _F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); });
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 9191738f9941..8f72039335c2 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -22,6 +22,7 @@
 #include <linux/screen_info.h>
 #include <linux/kernel.h>
 #include <linux/percpu.h>
+#include <linux/reboot.h>
 #include <linux/cpu.h>
 #include <linux/of.h>
 #include <linux/of_fdt.h>
@@ -522,7 +523,12 @@ void cpu_reset(void)
 
 void machine_restart(char * cmd)
 {
-	platform_restart();
+	local_irq_disable();
+	smp_send_stop();
+	do_kernel_restart(cmd);
+	pr_err("Reboot failed -- System halted\n");
+	while (1)
+		cpu_relax();
 }
 
 void machine_halt(void)
-- 
cgit